Zimbra founder Satish Dharmaraj will be the latest executive departure for Yahoo (NSDQ: YHOO), according to Kara Swisher. Dharmaraj joined the company following Yahoo’s acquisition of the Zimbra email platform for $350 million in 2007.

Yahoo has relied on Zimbra’s technology to bolster efforts to “open” its properties to third-party developers and advertisers—which is partly why analysts gave the deal a nod back when others in the industry questioned its merit. Dharmaraj took a backseat on those efforts when former Zimbra President and CTO Scott Dietzen was picked to head up the communications and community properties during a reorg last June, but his exit indicates that even the appointment of a new CEO hasn’t stopped Yahoo’s brain drain.

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